/Engine/Source/Runtime/Experimental/Chaos/Public/Chaos/PBDConstraintContainer.h
Create a constraint solver for an Evolution without Graph support (RBAN evolution). There will only be one of these per scene (RBAN node) and it is used to solve all constraints in the container (serially).
[TUniquePtr](API\Runtime\Core\Templates\TUniquePtr)< [FConstraintContainerSolver](API\Runtime\Chaos\Chaos\Evolution\FConstraintContainerSolver) > CreateSceneSolver ( const int32 Priority )